Lua 5.2 upgrade [1] for NSE.

[1] http://seclists.org/nmap-dev/2012/q2/34

scripts/http-axis2-dir-traversal.nse

@@ -1,3 +1,12 @@
+local creds = require "creds"
+local http = require "http"
+local io = require "io"
+local nmap = require "nmap"
+local shortport = require "shortport"
+local stdnse = require "stdnse"
+local string = require "string"
+local table = require "table"
+
 description = [[
 Exploits a directory traversal vulnerability in Apache Axis2 version 1.4.1 by sending a specially crafted request to the parameter <code>xsd</code> (OSVDB-59001). By default it will try to retrieve the configuration file of the Axis2 service <code>'/conf/axis2.xml'</code> using the path <code>'/axis2/services/'</code> to return the username and password of the admin account.
 
@@ -33,9 +42,6 @@ author = "Paulino Calderon"
 license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 categories = {"vuln", "intrusive", "exploit"}
 
-require "http"
-require "shortport"
-require "creds"
 
 portrule = shortport.http